Self-heating pack



FIG. 1 is an isometric view of the self-heating pack from the front;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left hand side view thereof;

FIG. 5 is a right hand side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof. 

CLAIM The ornamental design for self-heating pack, as shown and described. 